TY - JOUR TI - performance: An R Package for Assessment, Comparison and Testing of Statistical Models AU - Daniel Lüdecke AU - Mattan S. Ben‐Shachar AU - Indrajeet Patil AU - Philip Waggoner AU - Dominique Makowski PY - 2021 JO - The Journal of Open Source Software DO - 10.21105/joss.03139 UR - https://doi.org/10.21105/joss.03139 AB - A crucial part of statistical analysis is evaluating a model's quality and fit, or performance. During analysis, especially with regression models, investigating the fit of models to data also often involves selecting the best fitting model amongst many competing models. Upon investigation, fit indices should also be reported both visually and numerically to bring readers in on the investigative effort. ER -